question_answer

Total amount of \[C{{O}_{2}}\] fixed annually by plants

A) \[7\times 1{{0}^{23}}ton\]                   

B) \[7\times 1{{0}^{13}}ton\]

C) \[7\times 1{{0}^{10}}ton\]                   

D) \[7\times 1{{0}^{11}}ton\]